Disturbance observer control method in DGMSCMG

• Published in: Electronics letters Vol. 50; no. 14; pp. 989 - 990
• Main Authors: Sun, Jin-ji, Peng, Cong
• Format: Journal Article
• Language: English
• Published: Stevenage The Institution of Engineering and Technology 03.07.2014; Institution of Engineering and Technology; John Wiley & Sons, Inc
• Subjects: Applied sciences; axial magnetic bearing; Bearings, bushings, rolling bearings; Computer science; control theory; systems; Control engineering; Control system synthesis; Control theory. Systems; Design engineering; DGMSCMG; disturbance observer control method; Disturbance observers; Disturbances; double‐gimbal control moment gyro; Drives; Exact sciences and technology; external disturbances; Fundamental areas of phenomenology (including applications); Gimbals; H∞ control; Magnetic bearings; Mathematical analysis; Mechanical engineering. Machine design; Modelling and identification; observers; parameter variations; Physics; robust control; robust H∞ controller design; Solid dynamics (ballistics, collision, multibody system, stabilization...); Solid mechanics; Stability analysis; state space equation; state‐space methods; double-gimbal control moment gyro; parameter variations; magnetic bearings; stability analysis; DGMSCMG; control system synthesis; axial magnetic bearing; H∞ control; disturbance observer control method; robust H∞ controller design; robust control; external disturbances; state space equation; observers; state-space methods; Disturbance rejection; Attitude control; Stability; H infinite control; Solid dynamic; Control synthesis; Satellite; State space; State space method; Experimental study; Modeling; Robust control; Cardan suspensor; Magnetic bearing; Observer; Gyroscope; System identification; Actuator
• ISSN: 0013-5194; 1350-911X; 1350-911X
• DOI: 10.1049/el.2013.3756

To restrain disturbances produced by parameter variations and external disturbances in the axial magnetic bearing in the application of a double-gimbal control moment gyro (DGMSCMG), a disturbance observer control method is proposed, which integrated the H∞ controller and the disturbance observer. This method considers parameter variations of the magnetic bearing and the effect of gimbals on the axial magnetic bearing. Consequently, the state space equation is changed to the form which can eliminate the disturbances. Then the robust controller is designed, which includes the disturbance observer design and robust H∞ controller design. The stability analysis is given for the proposed controller. Experiments on the DGMSCMG verified the correctness of the proposed method.